Soot-blower for boilers.



s. c. & J. c. BENNETT.

'soow BLOWER FOR BOILERS.

APPLICATION FILED NOV. 24, 1916.

11 QQQQQQQ ]Patented @ept. 25, 1917.

3 SHEETSSHEET I.

Q 35% h Mn QBcmett G. C. & J C. BENNETT. soot BLOWER FoR' BOILERS.

v APFUCATION FILED NOV- 24,1916- 1 24Q926n Patentedfiept. 25, 1917.

damesggannett gordong fienndf G. C. & J. C. BENNETT.

800T BLOWER FOR BOILERS.

APPLICATION FILED NOV. 24, 1916.

Patented Sept. 25, 1917.

3 SHEETS-SHEET 3.

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aflvcwto'a Gimmes Bennett Gordon S. Emmett oonnon' 0. Bannister AND JAMES C. BENNETT, F DETR01iT, 1V[IGHIGAI LV.,

SOOT-rIBLOWER FOR BOILERS.

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Specification of Letters Patent.

Patentcdbept. 25, 3191?,

Application filed November 24, 1916. Serial 0. 133,166.

To (112 whom it may concern:

Be it known that we, GORDON C. BENNETT and JAMES C. BENNETT, citizens of the UnitedStates of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented-certain new and useful Improvements in Soot-Blowers for Boilers, of which the foll wing is a specification, reference being h d therein to the accompanying drawings.

This invention relates to soot blowersutilizing steam as an agent for removing soot, incrustations and foreign matter from the exterior surfaces of boiler tubes, to increase the 'efiiciency of a boiler as a steam generating apparatus.

ur invention aims to provide soot blowers that can be advantageously used in con nection with boilerswhich have staggeredly arranged tubes or parallel rows of tubes in I connectionwitheither of which the blowers are disposed to thoroughly cleanse the tubes by subjecting the same to a maximum pressure of steam in the form of jets, which will positively out andremove soot incrustations and foreign matter from the tubes.

To accomplish the above results in an expeditious and economical manner, we have devisedblower units that may be easily installed in a boilersetting and removed or' renewed, if occasion so demands, without disturbing the boiler setting. This is'a feature of our invention which is characterized by novel blower holdersin whichthe blower arms are reciprocable by'rotation and removable at any time.

Another feature of our invention is the construction of a blower arm, per se. The

blower arm has internal-nozzles so that said arms may be positioned in proximity to tubes and rotated without impinging against the tubes. v I I In providing a blower arm with internal nozzles, we'found that by welding the nozzles in'the arm, that said arms were necessarily subjected .to a heat treatment that made the arms more "indurate and consequently increased the longevity of the same. The advantage of prolonging the life of a blower arm is obvious, however, in prdvidh ing the blower holders, we made-provision whereby the blower arms can be completely removed from-a boiler necessary to renew a unit.

Another advantage is gained by making the blower arms rec p ocal by rotation, We

sure of steam in a few- -ref erred to,

setting should it be a ly scented r found-that the number of nozzles could be materially reduced and when properly disposed could beshifted to successively or progressively subject rows of tubes to the action ofsteam or a similar soot removing agent. 'By reducing the number of nozzles, itwas then each nozzle, consequently a more powerful jet of steam was obtained by constant presnozzles instead of in a largenumber of nozzles.

Uther advantages maybe derived from the soot blowers to and reference is had to the drawings, wherein p I V Figure 1 is a verticalcross sectional view of a boiler having staggeredly arranged tubes and provided'with a blower unit in accordance with ogr invention;

Fig. 2 is Fig. 3 1s -a vertical longitudinal sectional view of a boiler having parallel rows of tubes and provided with blower units in accordance with our invention;

Fig; 4: is a front elevation of the same, partly broken away and in section, on the line IVIV of Fig. 3.

Fig. 5 is an enlarged longitudinal sectional view of a portion of a blower unit, partly in elevation;

' ig. 6 is a longitudinal sectional view of 1 blower arms showing the internal nozzles thereof and the tive to tubes; I

Fig. 7. is alongitudinal sectional view of a portion of a blower positions of said arms relaarm.

In describing our invention by aid of the views above referred to we desire to point out'that the same are intended as merely illustrative of our soot blowers which are now-in use, and we do not care to, confine our invention to any particular type of boiler or steam generator or to the 'precise construction and S arrangement of parts s own. 'The, following description is therefore to be broadly construed as including such substitute constructions and arrangement of parts which are the obvious equivalents of those tobe hereinafter referred to. a

blower unit comprises a holder 1 suitanchoreol in a b il r setbe hereinafter specifically possible to increase the area of a longitudinal sectional viewof I the same showing a battery of blowers;

arm adapted for a particular type of boiler, and

ting, wall orsupport 2. The holder 1 may have a peripheral flange or Wings 3 intermeare consequently rather coarse compared to machined screw threads, however, the cast serewthreads constitute means for reciproeating a blower arm 6 when said arm is rotated. The blower arm 6 is tubular and has an enlarged exteriorly screwthreaded portion 7 in threaded engagement with the walls of the opening 5.

Inelosing the outer end of the blower arm 6 is a detachable steam jacket 8' provided with a stuifing box 9 and opposed arms 10. The arms 10 are connected by-nuts 11 to stay bolts or rods 12 carried by the face plate or cross head 4 of the holder 1.

The steam jacket 8 has a'steam inlet ,pipe 13 and on the blower arm, contiguous to the stuffing box 9, is a sprocket wheel 14 over,

which there is trained an endless sprocket chain 15. The sprocket wheel 14: and sprocket chain 15 constitute means for imparting a rotary. movement to the blower arm ,6 whereby said arm will be moved longitudinallyof the holder 1. v

The-inner end of the blower arm 6 has internal angularly disposed nozzles 16 andas heretofore mentioned, these nozzles have the outer ends welded in the arm so that the blower arm will receive-a heat treatment to prolong. the life of the same. The outer ends of the nozzles 16. are'flush with the outer wall of the blower arm and the inner' ends of the nozzles extend in prOXimity to the inner wall of the arm opposite that wall in which the nozzles are mounted. As shown in Fig. 6,-the nozzles 16 may be disposed at such anglesas to direct steam in reverse directions, according to the location and type of boiler in connection with which the'blower arm is used. As shown in Fig-7, the nozzles 17 may be disposed at. a right angle to the wall of the blower arm and this type of blowerarm is intended for a boiler having parallel rows of tubes.

Reference will now be had to Figsl 3 and.

shown in Fig. 7

purposes of clearly understanding the arrangement of tubes, may be considered vertical rows with the tubes of each row in a common vertical plane. Such an arrangement of tubes provides vertical spaces be tween the rows of tubes and it is into'these spaces that steam is directed by blower arms disposed transversely of the boilersetting and intersecting the rows of tubes. One of theblower arms for this type of boiler is The nozzles 17 are disposed at right angles to the walls of the blower arm and will direct steam downwardly between the rows of tubes. Since the blower arms may be reciprocated or shifted in the holders thereof, it is not necessary to provide nozzles corresponding in number to the spaces between the rows of tubes, as a single nozzle may serve a plurality of spaces and be gradually advanced from one space to another or moved throughout the length. of the holder.

Our lnvention is not necessarily limited to this construction as shown in Fig. 3, but on account of the height of some of the blower 'units, it is preferable to provide a common steam supply pipe 22 and connect the jackets thereto with controlling valves 23 in proximityto said pipe. The sprocket chains will be in uxtap'osition to the controlling valves 23 whereby a fireman or attendant of a boiler can readily control and manipulate the blower units. a

With that type of boiler having staggeredly arranged tubes, it is necessary to use blower arms such as shown in 'Fig...6, and by reference to-Figs. 1 and 2 of the drawings, it will be noted that a battery of blowers are arranged above tubes 24 beneath super heaters of the boiler, and that each lower unit has the regulating and cona trolling means thereof disposed for the conven1ence of the 'fireman or attendant of a boiler. With that type of blower arm shown in Fig. 6, it is' preferable to alternately arrange theblower arms so that the nozzles of certain armswill discharge steam in one direetion and the nozzles of the other arms discharge steam in an opposite direction, thereby subjecting all of the staggeredly arranged tubes to the cleansing action of steam. The angularity of the nozzles will cause the steam to impinge upon the surfaces of the tubes at a tangent and said nozzles may be spaced whereby a single nozzle will serve more than one of the spaces between the tubes of a boiler.

In Fig. 8 there is shown a tube bracket adapted to coiiperate with a blower holder in supporting a blower arm, said bracket constituting supporting means, independent of a wall, for guiding and holding theinner end of a blower arm. The bracket comprises a tube clamp 30 and an adjustable upright 31 having an eye or sleeve through which a blower arm 33 is adapted to slide.

It is through the medium of the adjustable upright 31 that the blower arm may be maintained in a desired plane relative .to tubes. The tube bracket may be used in old or new installation, preferably the former, while the socket members 20 are preferable in new boiler settings.

As outlined in the beginning, a reduction in the number of nozzles associated with the blower arms permit said nozzlesbeing of greater area, which is a desideratum in connection with soot blowers, as steam under pressure may be delivered at the most remote tubes of the boiler and be practically as effective a cleansing agent, as the steam emitted at the nozzles.

WVe attach considerable importance to the fact that the blower arm holders are permanent relative to a boiler setting or other support and that the blower arms may be easily removed should occasion require. This may be accomplished by removing the jacket 8 from the end of the blower arm. It is then an easy matter to rotate the blower arm until the threaded enlarged portion thereof becomes disengaged from the boiler 1, thus leaving the permanent supporting meansin position for future use or a new blower arm.

Another important feature of our invention is that of placing a blower arm in screwthreaded engagement with a wall of a boiler setting and when manufacturing the blower arms it is possible to predetermine the distance the blower arms will travel when reciprocated relative to fines. The pitch of the threads will determine how fast the blower arms may be advanced when the sprocket chains 15 are manually manipulated, consequently a fireman or attendant of the boiler is relieved of any uncertainty as to how fast the blower arms are moving and whether they are effective for the purpose intended. We are aware of a great many blowers which are capable of eflective blowing when properly manipulated that are condemned on account of improper manipulation by inexperience or careless firemen. With our soot blower the chances of the same being improperly handled are re-' that the outer end of the steam jacket 8 has a detachable plug 40 provided with a threaded stem 41. This stem extends. into the open end of the blower arm 6 and is in threaded engagement with a nut 42 mount-ed in the end of said blower arm. The end of I the blower arm is perforated or apertured, as at 43, so that steam can enter the same during its adjustment or in any position of the blower arm. The threads in connection with the stem 41 and the nut 42 are of the same pitch and character as the threads in connection with. the holder 1 and the threaded portion 7 of the blower arm, and in some instances it may be necessary to dispense with the threaded connection at the holder 1 and depend for longitudinal adjustment in the steam jacket 8. As long as the inner ends of the blower arms are supported relative to the tubes, it is possible to support the outer ends of the blower arms at the steam jackets 8 and reciprocate the blower arms by reason of the connections with the steam jackets, and thereby accomplish practically the same results as though the longitudinal movement of the blower arms was accomplished through the medium of the holders 1.

What we claim is 1. In a soot blower, a boiler setting, tubes, permanent interiorly screwthreaded blower holders in said boiler setting, rotary exteriorly screwthreaded tube blowers in said holders adapted for reciprocation by reason of the threaded connection between said holders and the blowers to move in proximity to said tubes, internal nozzles carried by said blowers to discharge steam between said tubes, and permit of said blowers being bodily withdrawn through said holders.

2. In a soot blower, an interiorly screwthreaded holder, and a blower arm devoid of protuberance so as to be placed in and removed from said holder and having an exteriorly screwthreaded enlargement for.

engagement with said holder.

3. In a soot blower, a boiler setting, tubes, permanent interiorly screwthreaded blower holders in a wall of said boiler setting, tube brackets adjacent an opposite wall of the boiler setting, rotary-tube blowers in screwthreaded engagement with said holders extending transversely of said tubes through said tube brackets and adapted for reciprocation therein by a rotary movement of said blowers, and nozzles carried by said blowers and confined so as to permit of the blowers being withdrawn through the holders. 7

In testimony whereof we afiix our signatures in presence of two witnesses.

GORDON C. BENNETT. JAMES C. BENNETT. Witnesses:

KARL I-I. BUTLER, ANNA M. Donn. 

